ram: renesas: dbsc5: Clarify MR27/MR28/MR57 register operations

Rename dbsc5_ddr_register_read() to dbsc5_ddr_register_mr27_mr57_read()
and dbsc5_ddr_register_set() to dbsc5_ddr_register_mr28_set() to make
it clear what those functions really do. No functional change.

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