fix(libc): replace true-false with explicit comparisons

This corrects the MISRA violation C2012-10.1:
This change avoids implicit conversions between standard boolean
types and integer types, ensuring type safety and compliance.
Replaced definitions of `true` and `false` in <stdbool.h> with
explicit equality ('0'=='0') and inequality ('1'=='0') checks.

Change-Id: I507522c8be8654d830f73f32dd4ca9fe98cf0f8f
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
1 file changed