make aes_setupEnc a static function.

Reference: /n/sources/patch/applied/aesstatic
Date: Sun Apr  3 11:38:50 CES 2011
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libsec/port/aes.c	Sun Apr  3 11:38:16 2011
+++ /sys/src/libsec/port/aes.c	Sun Apr  3 11:38:11 2011
@@ -59,7 +59,7 @@
 	},
 };
 
-int aes_setupEnc(ulong rk[/*4*(Nr + 1)*/], const uchar cipherKey[],
+static int aes_setupEnc(ulong rk[/*4*(Nr + 1)*/], const uchar cipherKey[],
 		int keyBits);
 static int aes_setupDec(ulong rk[/*4*(Nr + 1)*/], const uchar cipherKey[],
 		int keyBits);
@@ -1158,7 +1158,7 @@
  *
  * @return	the number of rounds for the given cipher key size.
  */
-int
+static int
 aes_setupEnc(ulong rk[/*4*(Nr + 1)*/], const uchar cipherKey[], int keyBits)
 {
 	int i = 0;