soc/amd/stoneyridge: Use macros for PCI_DEVFN calls

 * Change all calls to PCI_DEVFN to macros
 * Remove CBB and CDB Kconfig since these are static for stoneyridge

BUG=b:62200746
TEST=build

Change-Id: I001c4ccd0ad7cf2047870b3618e13642144ddf56
Signed-off-by: Chris Ching <chingcodes@google.com>
Reviewed-on: https://review.coreboot.org/22110
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/soc/amd/stoneyridge/lpc.c b/src/soc/amd/stoneyridge/lpc.c
index 8206950..d3cb46f 100644
--- a/src/soc/amd/stoneyridge/lpc.c
+++ b/src/soc/amd/stoneyridge/lpc.c
@@ -44,7 +44,7 @@
 	 * Enable the LPC Controller
 	 * SMBus register 0x64 is not defined in public datasheet.
 	 */
-	sm_dev = dev_find_slot(0, PCI_DEVFN(SMBUS_DEV, SMBUS_FUNC));
+	sm_dev = dev_find_slot(0, SMBUS_DEVFN);
 	dword = pci_read_config32(sm_dev, 0x64);
 	dword |= 1 << 20;
 	pci_write_config32(sm_dev, 0x64, dword);