ironlake/ibexpeak: Move early_smbus.c to common code

We will update the other platforms to use this common code in
susbsequent commits. While we are at it, reflow a broken line,
define the SMBus PCI device in the header and fix whitespace.

Change-Id: I1fdff2feead4165f02b24cb948d8c03318969014
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41999
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/ibexpeak/Kconfig b/src/southbridge/intel/ibexpeak/Kconfig
index 691459e..07f9b6b 100644
--- a/src/southbridge/intel/ibexpeak/Kconfig
+++ b/src/southbridge/intel/ibexpeak/Kconfig
@@ -16,6 +16,7 @@
 	select SOUTHBRIDGE_INTEL_COMMON_FINALIZE
 	select SOUTHBRIDGE_INTEL_COMMON_RCBA_PIRQ
 	select SOUTHBRIDGE_INTEL_COMMON_SMBUS
+	select SOUTHBRIDGE_INTEL_COMMON_EARLY_SMBUS
 	select SOUTHBRIDGE_INTEL_COMMON_SPI_ICH9
 	select SOUTHBRIDGE_INTEL_COMMON_SMM
 	select SOUTHBRIDGE_INTEL_COMMON_PMCLIB