Made the following updates based on review feedback
Fixed mixed variable declaration and simplified cases by typedefing
wolfssl_RX64_HW_Hash to wc_Sha, wc_Sha224, & wc_Sha256
Added files to include.am so they are built when using make
Add WOLFSSL_RENESAS_RX64_HASH to settings.h and set WOLFSSL_NO_HASH_RAW
in settings.h based on value of WOLFSSL_RENESAS_RX64_HASH
Add and handle return value for rx64_hw_Open
Fix some minor formatting and comments