Clean up

Following commit just covers few spellings and grammatical corrections
in src code files and README.

Verified:
No impact on oob-bios functionality.

Change-Id: Iaaa1a89186928fbb750c5f38fc163a12597ced08
Signed-off-by: Smriti-Ayushi <smriti.ayushi@linux.intel.com>
3 files changed