ram: renesas: dbsc5: Factor out dbsc5_wait_dbwait()

Extract wait for completion code from dbsc5_send_dbcmd2() into
new separate function dbsc5_wait_dbwait(). This extracted code
can be used to implement MR register read in the future.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
1 file changed