The r8a7791 GPIO resources are currently incorrect. Fix that
by making them match the English r8a7791 v0.31 data sheet.

Tested with GPIO LED using Koelsch DT reference.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NSimon Horman <horms@verge.net.au>