Remove non-ascii & unprintable characters

These non-ascii & unprintable characters aren't needed.

Change-Id: I129f729f66d6a692de729d76971f7deb7a19c254
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/15977
Tested-by: build bot (Jenkins)
Reviewed-by: Omar Pakker
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/x86/smbios.c

@@ -16,7 +16,7 @@
  */
 
 /*
- * Standard Manufacturer’s Identification Code
+ * Standard Manufacturer's Identification Code
  * JEP106AS (Revision of JEP106AR, October 2015)
  * MAY 2016
  * http://www.jedec.org/standards-documents/results/JEP106AS