Fix adv7180 patch.

It seems that some bit of commit f71be6d7a7aef1a496f73a9d9f8316c0e9477bb5
      mx6_nitrogen6x: reserve 128M v4l2 memory to prevent dma alloc failure
leaked into commit 73898f34936475555d4797c0c64b24c4952c0c9a
      mx6_nitrogen6x: add adv7180 tv input camera

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>