ARM: mx53: Fix alternate modes for MX53_PAD_PATA_DATA6

MX53_PAD_PATA_DATA6 can have the following alternate modes:

PATA_DATA_6:  		mode 0
GPIO2_6:		mode 1
EMI_NANDF_D_6:		mode 3
ESDHC4_DAT6		mode 4
GPU3d_GPU_DEBUG_OUT_6	mode 5
IPU_DIAG_BUS_6		mode 6

Fix the modes accordingly.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dinh Nguyen <dinh.nguyen@freescale.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>