flatcc: drop 'r' from gitr and ${SRCPV}
* +git is preferred over +gitr since 2012:
https://lists.openembedded.org/g/openembedded-core/topic/72154716#16837
some recipes still use +gitr, because updating it would cause PV going backwards
but this recipe was added just recently so adjust that
* Drop SRCPV similarly like oe-core did in:
https://git.openembedded.org/openembedded-core/commit/?h=nanbield&id=843f82a246a535c353e08072f252d1dc78217872
* SRCPV is deferred now from PV to PKGV since:
https://git.openembedded.org/openembedded-core/commit/?h=nanbield&id=a8e7b0f932b9ea69b3a218fca18041676c65aba0
Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>