imx-common: consider mux_ctrl_ofs when setting mux_mode

Some i.MXes use __NA_ or 0 to avoid setting mux_mode, but the following patch
only take i.MX6/7 into consideration.

"c3c8a5748897b24f18618047804317167a531dd3 imx-common: fix iomux settings"

Use is_soc_type(MXC_CPU_MX7) to avoid breaking other i.MXes when
setting mux_mode.

In this patch, switch to use "asm/imx-common/sys_proto.h" to avoid
build break for "is_soc_type" for vf610 and mx25.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>

arch/arm/imx-common/iomux-v3.c

@@ -11,10 +11,8 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
-#if !defined(CONFIG_MX25) && !defined(CONFIG_VF610)
-#include <asm/arch/sys_proto.h>
-#endif
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/sys_proto.h>
 
 static void *base = (void *)IOMUXC_BASE_ADDR;
 
@@ -53,7 +51,8 @@ void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
 	}
 #endif
 
-	__raw_writel(mux_mode, base + mux_ctrl_ofs);
+	if (is_soc_type(MXC_SOC_MX7) || mux_ctrl_ofs)
+		__raw_writel(mux_mode, base + mux_ctrl_ofs);
 
 	if (sel_input_ofs)
 		__raw_writel(sel_input, base + sel_input_ofs);