ENGR00213997: Fix Section Mismatch warning

ENGR00213997: Fix Section Mismatch warning

Fix:
WARNING: vmlinux.o(.data+0x8c28): Section mismatch in reference from the
variable mx6_gpmi_nand_platform_data to the function
.init.text:gpmi_nand_platform_init()
The variable mx6_gpmi_nand_platform_data references
the function __init gpmi_nand_platform_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

Signed-off-by: Robby Cai <R63905@freescale.com>