Add a TF201 mach type (CARDHU typeid)

TF201 machtype allows us to use machine_is_tf201().
Due to bootloader, we need to use the cardhu machtype.
This is OK, because MACH_TF201 requires !MACH_CARDHU.

arch/arm/mach-tegra/board-tf201-power.c

@@ -1031,7 +1031,7 @@ static struct platform_device tf201_charger_device = {
 static int __init tf201_charger_late_init(void)
 {
 	// required because bootloader identifies as cardhu
-	if (!machine_is_cardhu())
+	if (!machine_is_tf201())
 		return 0;
 
 	platform_device_register(&tf201_charger_device);

arch/arm/mach-tegra/board-tf201.c

@@ -836,7 +836,7 @@ static void __init tegra_tf201_reserve(void)
 
 // Has to be cardhu to match bootloader.
 // This board is NOT cardhu, but derived from it.
-MACHINE_START(CARDHU, "cardhu")
+MACHINE_START(TF201, "tf201")
 	.boot_params    = 0x80000100,
 	.map_io         = tegra_map_common_io,
 	.reserve        = tegra_tf201_reserve,

arch/arm/tools/mach-types

@@ -1056,6 +1056,7 @@ t55			MACH_T55		T55			3433
 bio3k			MACH_BIO3K		BIO3K			3434
 expressct		MACH_EXPRESSCT		EXPRESSCT		3435
 cardhu			MACH_CARDHU		CARDHU			3436
+tf201			MACH_TF201		TF201			3436
 aruba			MACH_ARUBA		ARUBA			3437
 bonaire			MACH_BONAIRE		BONAIRE			3438
 nuc700evb		MACH_NUC700EVB		NUC700EVB		3439

sound/soc/tegra/tegra_rt5631.c

@@ -153,7 +153,7 @@ static int tegra_rt5631_init(struct snd_soc_pcm_runtime *rtd)
 
 	int ret;
 	printk("%s+\n", __func__);
-	if (machine_is_cardhu() || machine_is_ventana()) {
+	if (machine_is_tf201() || machine_is_cardhu() || machine_is_ventana()) {
 		ret = snd_soc_add_controls(codec, cardhu_controls,
 				ARRAY_SIZE(cardhu_controls));
 		if (ret < 0)