ARM: tegra: fix colibri_t20 machine type

A while ago I got Russell to change the machine type of our Colibri T20
from COLIBRI_TEGRA2 to COLIBRI_T20 which at least in parts is also
reflected in his machine registry:

http://www.arm.linux.org.uk/developer/machines/list.php?id=3323

For us it is really very beneficial to actually still be able to boot
downstream L4T kernel with its working hardware accelerated
graphics/multimedia stack albeit it being proprietary/closed-source.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/include/asm/mach-types.h

@@ -936,7 +936,7 @@ extern unsigned int __machine_arch_type;
 #define MACH_TYPE_CWME9210             3320
 #define MACH_TYPE_CWME9210JS           3321
 #define MACH_TYPE_PGS_SITARA           3322
-#define MACH_TYPE_COLIBRI_TEGRA2       3323
+#define MACH_TYPE_COLIBRI_T20          3323
 #define MACH_TYPE_W21                  3324
 #define MACH_TYPE_POLYSAT1             3325
 #define MACH_TYPE_DATAWAY              3326
@@ -12197,16 +12197,16 @@ extern unsigned int __machine_arch_type;
 # define machine_is_pgs_v1()	(0)
 #endif
 
-#ifdef CONFIG_MACH_COLIBRI_TEGRA2
+#ifdef CONFIG_MACH_COLIBRI_T20
 # ifdef machine_arch_type
 #  undef machine_arch_type
 #  define machine_arch_type	__machine_arch_type
 # else
-#  define machine_arch_type	MACH_TYPE_COLIBRI_TEGRA2
+#  define machine_arch_type	MACH_TYPE_COLIBRI_T20
 # endif
-# define machine_is_colibri_tegra2()	(machine_arch_type == MACH_TYPE_COLIBRI_TEGRA2)
+# define machine_is_colibri_t20()	(machine_arch_type == MACH_TYPE_COLIBRI_T20)
 #else
-# define machine_is_colibri_tegra2()	(0)
+# define machine_is_colibri_t20()	(0)
 #endif
 
 #ifdef CONFIG_MACH_W21