amdfam10 boards: Drop AMD_SB_CIMX

Copy-paste, boards do not set this.

Change-Id: I4c0795a483948b1e357388a5ad639c3f1950bbc8
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30625
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/southbridge/amd/rs780/rs780.c

@@ -349,7 +349,6 @@ void rs780_enable(struct device *dev)
 	}
 }
 
-#if !IS_ENABLED(CONFIG_AMD_SB_CIMX)
 unsigned long acpi_fill_mcfg(unsigned long current)
 {
 	/* FIXME
@@ -358,7 +357,6 @@ unsigned long acpi_fill_mcfg(unsigned long current)
 	 */
 	return current;
 }
-#endif
 
 struct chip_operations southbridge_amd_rs780_ops = {
 	CHIP_NAME("ATI RS780")