ARM: rmobile: Convert ifdef in rmobile_get_prr() to IS_ENABLED()

Switch ifdef in rmobile_get_prr() to IS_ENABLED() macro.
The CONFIG_RCAR_GEN3 will never have SPL counterpart, so
the IS_ENABLED() macro is the right one here. No functional
change, except for improved build test coverage.

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