ARM: imx: fix: Provide correct enum values for ONENAND/NOR boot recognition

According to "Table 5-1. Boot Device Select" (page 335,
i.MX 6Dual/6Quad Applications Processor Reference Manual, Rev. 4, 09/2017)
the BOOT_CFG1[3] have following values (regarding EIM booting):
0 - NOR flash and 1 - ONENAND

This commit provides correct identification of the boot medium for IMX6Q
boards booting from NOR memory (MCCMON6 is one of them).

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/arch/arm/include/asm/mach-imx/sys_proto.h b/arch/arm/include/asm/mach-imx/sys_proto.h
index 8d6832a..d0f866b 100644
--- a/arch/arm/include/asm/mach-imx/sys_proto.h
+++ b/arch/arm/include/asm/mach-imx/sys_proto.h
@@ -67,8 +67,8 @@
 };
 
 enum imx6_bmode_emi {
-	IMX6_BMODE_ONENAND,
 	IMX6_BMODE_NOR,
+	IMX6_BMODE_ONENAND,
 };
 
 enum imx6_bmode {