ARM: dts: imx6q: remove the unused pins for gpmi-nand

The gpmi does not use the MX6Q_PAD_NANDF_CS2__NAND_CE2_B and
MX6Q_PAD_NANDF_CS3__NAND_CE3_B.

Just remove them.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q.dtsi

@@ -168,8 +168,6 @@ MX6Q_PAD_NANDF_WP_B__NAND_WP_B   0xb0b1
 							MX6Q_PAD_NANDF_RB0__NAND_READY_B 0xb000
 							MX6Q_PAD_NANDF_CS0__NAND_CE0_B   0xb0b1
 							MX6Q_PAD_NANDF_CS1__NAND_CE1_B   0xb0b1
-							MX6Q_PAD_NANDF_CS2__NAND_CE2_B   0xb0b1
-							MX6Q_PAD_NANDF_CS3__NAND_CE3_B   0xb0b1
 							MX6Q_PAD_SD4_CMD__NAND_RE_B      0xb0b1
 							MX6Q_PAD_SD4_CLK__NAND_WE_B      0xb0b1
 							MX6Q_PAD_NANDF_D0__NAND_DATA00   0xb0b1