omapdrm fixes for 4.2
Small fixes for omapdrm, including:
* Fix packed 24 bit color formats
* Ensure the planes are inside the crtc
* Handle out-of-dma-memory error
* tag 'omapdrm-4.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
drm/omap: replace ALIGN(PAGE_SIZE) by PAGE_ALIGN
drm/omap: fix align_pitch() for 24 bits per pixel
drm/omap: fix omap_gem_put_paddr() error handling
drm/omap: fix omap_framebuffer_unpin() error handling
drm/omap: increase DMM transaction timeout
drm/omap: check that plane is inside crtc
drm/omap: return error if dma_alloc_writecombine fails