Revert "msm: Add NULL pointer check before ion cache operation"

This reverts commit 3317f6d90855f011f63fc1320dd1b417af5bb1f4.
Revert "msm: scm: Add logging of actual return code from scm call"

This reverts commit a094708a9843b719d9d80e2cd4fd697f0d274f29.
Revert "msm: scm: Add scm_call_noalloc and helper macros"

This reverts commit a01ca9c46a2d387177c964c59e398f3873e2f60f.
Revert "msm: scm: Flush the command buffer only instead of the entire cache"

This reverts commit d53889076c9684f9e98e3dd9c69183891cf3b763.