Adds support for QSPI on the r8a7790.
Signed-off-by: NHiep Cao Minh <cm-hiep@jinso.co.jp>
Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>