soc/intel/skylake: Clean up report_cpu_info() function

This patch makes below clean-up for report_cpu_info()
function.
1. Remove unused variables.
2. Make fill_processor_name function available in bootblock.
3. Reuse fill_processor_name.

TEST= Succesfully able to boot soraka and verify the
cpu_name "CPU: Intel(R) Pentium(R) CPU 4415Y @ 1.60GHz"

Change-Id: Idf7b04edc3fce147f7856591ce7e5a0cd05f43fe
Signed-off-by: Usha P <usha.p@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36840
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/x86/name/Makefile.inc

@@ -11,4 +11,5 @@
 ## GNU General Public License for more details.
 ##
 
+bootblock-y += name.c
 ramstage-y += name.c