OvmfPkg/MemEncryptSevLib: Coding style fixes in prep for SEC library
    
    BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3108
    
    Creating an SEC version of the library requires renaming an existing file
    which will result in the existing code failing ECC. Prior to renaming the
    existing file, fix the coding style to avoid the ECC failure.
    
    Cc: Jordan Justen <jordan.l.justen@intel.com>
    Cc: Laszlo Ersek <lersek@redhat.com>
    Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
    Cc: Brijesh Singh <brijesh.singh@amd.com>
    Reviewed-by: Laszlo Ersek <lersek@redhat.com>
    Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
    Message-Id: <f765d867da4a703e0a0db35e26515a911482fd40.1610045305.git.thomas.lendacky@amd.com>