west.yml: update zephyr to e4c2cecb7d8

Total of 562 commits.

Changes include:

9cadc8cbec3 xtensa: userspace: use ADDX4 to calculate syscall table
            index
277fa9e8ac0 xtensa: userspace: swap page tables via assembly code
689e1121cf6 kernel: typedef k_mem_domain_t and _mem_domain_info_t
2abf7ce2f12 xtensa: userspace: prevent potential privilege escalation
d5c2e4b03c8 xtensa: userspace: workaround return PC calc with loops
bdb5723f282 xtensa: userspace: remove ununsed syscall helpers
b0693ee41b4 xtensa: userspace: handle privileged stack in
            arch_cohere_stacks
9ebe16b6e78 xtensa: no need to restore A0/A1 if not coherence in irq
            exit
0dce0bdc0b7 xtensa: userspace: pre-compute MMU registers at domain init
36064939d3a xtensa: no need for flush register if threads are pin only
50abe899703 xtensa: userspace: use ZSR_RFI_LEVEL for userspace enter
af5dfff3ae4 xtensa: userspace: use ZSR_RFI_LEVEL for syscall return
514cd384318 xtensa: userspace: remove jump to _syscall_returned
7f028e2f6e3 xtensa: userspace: align stack before calling syscall
            handler
482f9fbbfbc xtensa: pad IRQ stack frame to be 16 bytes aligned
7229b004332 xtensa: window may overflow during irq stack crossing
9610f1a2293 xtensa: mmu: do not force small vector table
774b73c8a45 xtensa: userspace: swap page table at end of cross stack
            call
e0752c29380 xtensa: userspace: swap page table earlier in xtensa_switch
6874cdcf19f xtensa: fix unneeded cache invalidation in
            arch_cohere_stacks()
9fb87cf5864 xtensa: remove second cross stack trampoline
3f8e4d7400f xtensa: rework IRQ masking during IRQ entrance
dcf75319e2a xtensa: set pointer to privileged stack only if user mode
d725f37d5ea xtensa: userspace: calculate PC earlier at syscall entry
1203ed05d94 xtensa: syscall: fix setting up PS for window spilling
7f693679b8d xtensa: move FPU_REG_SAVE out of ODD_REG_SAVE
c13c4995570 xtensa: add ODD_REG_RESTORE
fc85aface12 xtensa: parameterized ODD_REG_SAVE
10f8882eeca xtensa: userspace: remove saving HiFi registers for syscalls
d9f68820714 xtensa: rsync before reading ZSR_FLUSH
a4367eb5145 xtensa: remove
            CONFIG_XTENSA_INVALIDATE_MEM_DOMAIN_TLB_ON_SWAP
ee9ddb0eeba xtensa: remove CALC_PTEVADDR_BASE and PRELOAD_PTEVADDR
            macros
833bb667b2c xtensa: fix thread_page_tables_get being unused
71a0f39568e pm: device: correct state in `pm_device_driver_init`
226c6ae17c8 pm: Optimize pre-wakeup in suspend procedure

The current update does not point to the top of the main branch because
since commit ecabcf5db56, changes have been introduced that break the
compatibility of SOF's CONFIG_PM_POLICY_CUSTOM. The lost compatibility
will be restored in subsequent PRs and the additional
CONFIG_PM_POLICY_CUSTOM will be disabled in favor of the default version
(at the moment this is not yet possible).

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>

Author: tmleman

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: 8bdf533d76471873090aad3d511e037f14ee7cad
+      revision: e4c2cecb7d8fb3f3b576633c3a4bf8e4647c93f8
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision