pfuze: Fix unsigned variable for less-than-zero comparison

According to the Coverity result, a unsigned int variable is used fo less-
than-zero comparison, the result is never true. Need to fix the variable
type to signed int.

Signed-off-by: Ye.Li <B37916@freescale.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Stefano Babic <sbabic@denx.de>

board/freescale/common/pfuze.c

@@ -13,7 +13,8 @@
 int pfuze_mode_init(struct pmic *p, u32 mode)
 {
 	unsigned char offset, i, switch_num;
-	u32 id, ret;
+	u32 id;
+	int ret;
 
 	pmic_reg_read(p, PFUZE100_DEVICEID, &id);
 	id = id & 0xf;