ARM: tegra: MASK_BITS_ no longer needs specific values

Since all code that sets or interprets MASK_BITS_* now uses the enums
to define/compare the values, there is no need for MASK_BITS_* to have
a specific integer value. In fact, having a specific integer value may
encourage people to hard-code those values, or interpret the values in
incorrect ways.

As such, remove the logic that assigns a specific value to the enum
values in order to make it completely clear that it's just an enum, not
something that directly represents some integer value.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Reviewed-by: NThierry Reding <treding@nvidia.com>
Tested-by: NThierry Reding <treding@nvidia.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NTom Warren <twarren@nvidia.com>

arch/arm/include/asm/arch-tegra/clock.h

@@ -30,7 +30,7 @@ enum clock_osc_freq {
  * them all together and pretends they're all 31:28.
  */
 enum {
-	MASK_BITS_31_30	= 2,	/* num of bits used to specify clock source */
+	MASK_BITS_31_30,
 	MASK_BITS_31_29,
 	MASK_BITS_31_28,
 };