uboot-imx

pm9263: fix compile warning

Fix warning:

	pm9263.c: In function 'pm9263_macb_hw_init':
	pm9263.c:99: warning: unused variable 'pio'

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Ilko Iliev <iliev@ronetix.at>