Revert "rpi-backend: ensure pixels is destroyed in resource_update"

This reverts commit b341c735c30f26dc9d5ead3241181a0e720fe7c1.
rpi: free pixels only if apply_opaque_region was called

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
rpi: call eglTerminate if we're bailing

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>