SCB_DisableDCache: Always use __ALIGNED attribute for struct locals when using gcc/clang

[rtborg]

Struct locals was only aligned to the D-cache line size when __OPTIMIZE__ was not defined. This led to intermittent failures (endless loop) of MIMXRT1166.
This removes the !defined(__OPTIMIZE__) condition so the struct is always aligned when building with gcc or clang, for every optimization level.

Related to #286

[fatiki]

Maybe @JonatanAntoni you could have a look here, since you also reviewed #288.

[minyuan-xue]

I also encountered this problem when using -Og. This solution is necessary, but the parentheses here are not matched. Hope this PR can be merged soon.

[github-actions]

Test Results

   256 files   -    388     256 suites   - 388   0s ⏱️ - 11m 55s
    56 tests +     7      54 ✅ +   10      2 💤  -     3  0 ❌ ±0 
13 860 runs   - 17 696  11 476 ✅  - 8 680  2 384 💤  - 9 016  0 ❌ ±0 

Results for commit e01645a. ± Comparison against base commit 0be833b.

This pull request removes 49 and adds 56 tests. Note that renamed tests count towards both.

CMSIS-Core.src ‑ apsr.c
CMSIS-Core.src ‑ basepri.c
CMSIS-Core.src ‑ bkpt.c
CMSIS-Core.src ‑ clrex.c
CMSIS-Core.src ‑ clz.c
CMSIS-Core.src ‑ control.c
CMSIS-Core.src ‑ cp15.c
CMSIS-Core.src ‑ cpsr.c
CMSIS-Core.src ‑ dmb.c
CMSIS-Core.src ‑ dsb.c
…

TC_CML1Cache_CleanDCacheByAddrWhileDisabled
TC_CML1Cache_EnDisableDCache
TC_CML1Cache_EnDisableICache
TC_CoreFunc_APSR
TC_CoreFunc_BASEPRI
TC_CoreFunc_Control
TC_CoreFunc_EnDisIRQ
TC_CoreFunc_EncDecIRQPrio
TC_CoreFunc_FAULTMASK
TC_CoreFunc_FPSCR
…

This pull request removes 5 skipped tests and adds 2 skipped tests. Note that renamed tests count towards both.

CMSIS-Core.src ‑ lda.c
CMSIS-Core.src ‑ ldaex.c
CMSIS-Core.src ‑ stl.c
CMSIS-Core.src ‑ stlex.c
CMSIS-Core.src ‑ systick.c

TC_CoreInstr_WFE
TC_CoreInstr_WFI

♻️ This comment has been updated with latest results.