alpr board: Fix GCC 4.6 build warnings

Fix:
fpga.c: In function 'fpga_pre_fn':
fpga.c:88:16: warning: variable 'reg' set but not used
[-Wunused-but-set-variable]
nand.c: In function 'alpr_nand_dev_ready':
nand.c:125:18: warning: variable 'val' set but not used
[-Wunused-but-set-variable]
Signed-off-by: NWolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Acked-by: NStefan Roese <sr@denx.de>

board/prodrive/alpr/fpga.c

@@ -85,9 +85,6 @@ static unsigned long regval;
 /* PROGRAM_SEL_DPR	= LOW */
 int fpga_pre_fn(int cookie)
 {
-	unsigned long	reg;
-
-	reg = in32(GPIO0_IR);
 	/* Enable the FPGA Chain */
 	SET_GPIO_REG_1(GPIO0_TCR, CONFIG_SYS_GPIO_PROG_EN);
 	SET_GPIO_REG_0(GPIO0_ODR, CONFIG_SYS_GPIO_PROG_EN);

board/prodrive/alpr/nand.c

@@ -122,12 +122,10 @@ static int alpr_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len
 
 static int alpr_nand_dev_ready(struct mtd_info *mtd)
 {
-	volatile u_char val;
-
 	/*
 	 * Blocking read to wait for NAND to be ready
 	 */
-	val = readb(&(alpr_ndfc->addr_wait));
+	(void)readb(&(alpr_ndfc->addr_wait));
 
 	/*
 	 * Return always true