boot: Add some missing unused arguments
In MCUBOOT_RAM_LOAD mode, bootutil_img_hash has some arguments that end
up being unused, which creates warnings.  Add these to the list of
variables intentionally unused.
@@ -85,6 +85,9 @@ bootutil_img_hash(struct enc_key_data *enc_state, int image_index,
(void)blk_sz;
(void)off;
(void)rc;
+ (void)fap;
+ (void)tmp_buf;
+ (void)tmp_buf_sz;
#endif
#endif
