linux-imx: Bump PR so version does not go backwards
This allow removal of the PRINC, which is deprecated and will be
removed after Yocto Project 1.6 release, from meta-fsl-arm-extra. The
equivalent change need to be updated in meta-fsl-arm-extra at same
time, to avoid version to go backwards.
While dropping it, we also drop the INC_PR variable as it were in use
just for the PRINC case and the other linux-imx.inc users do not use
it.
Change-Id: Ia66f686f584a72a0b173b8e2fdd00c015c519e2b Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
