lib: rsa: superfluous initialization in rsa_verify()

Remove initialization of ret with unused value.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index b9c800c..0ab0f62 100644
--- a/lib/rsa/rsa-verify.c
+++ b/lib/rsa/rsa-verify.c
@@ -545,7 +545,7 @@
 {
 	/* Reserve memory for maximum checksum-length */
 	uint8_t hash[info->crypto->key_len];
-	int ret = -EACCES;
+	int ret;
 
 	/*
 	 * Verify that the checksum-length does not exceed the