EDAC/amd64: Fix indentation in umc_determine_edac_cap()

Use consistent indentation to improve the readability and fix:

  drivers/edac/amd64_edac.c:1279 umc_determine_edac_cap() warn: inconsistent indenting

Fixes: f6a4b4a1 ("EDAC/amd64: Split determine_edac_cap() into dct/umc functions")
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230404022557.46409-1-yang.lee@linux.alibaba.com