RISC-V: stop selecting SiFive clock and serial drivers directly

The SiFive clock and serial drivers will now default to the value of
SOC_SIFIVE so there is no need to directly select their symbols
anymore.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Conor Dooley 2022-10-05 18:13:48 +01:00
commit 0e6aee5bcc