lynxpoint: Move a bit of generic RCBA into early_pch

Rather than have to repeat this bit in every mainboard.

Also, remove the reset of the RTC power status from here.
We had done this in TOT for current platforms but did not
carry it back to emeraldlake2 where this branched from.

If we clear the status here then we don't get an event
logged later which can be important for the devices that
do not have a CMOS battery.

Change-Id: Ia7131e9d9e7cf86228a285df652a96bcabf05260
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/2683
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/intel/baskingridge/romstage.c

@@ -79,11 +79,6 @@ const struct rcba_config_instruction rcba_config[] = {
 	/* Disable unused devices (board specific) */
 	RCBA_RMW_REG_32(FD, ~0, PCH_DISABLE_ALWAYS),
 
-	/* Enable IOAPIC (generic) */
-	RCBA_SET_REG_16(OIC, 0x0100),
-	/* PCH BWG says to read back the IOAPIC enable register */
-	RCBA_READ_REG_16(OIC),
-
 	RCBA_END_CONFIG,
 };