fix(st-crypto): resolve MISRA warning in HASH

Resolve folowing MISRA warning in stm32_hash :
MISRA-c2012-10.3 MISRA-c2012-10.4 MISRA-c2012-17.7 MISRA-c2012-17.8
MISRA-c2012-18.4 MISRA-c2012-21.15

Signed-off-by: Thomas BOURGOIN <thomas.bourgoin@foss.st.com>
Change-Id: Ia37b5b0f706701ca2827d47c9360dfcf83a48fc0
1 file changed