This patch fixes the following Ecc reported error: Only capital letters are allowed to be used for #define declarations The "SerialPrint" macro is definied for the PrePi module residing in the ArmPlatformPkg. It is never used in the module. The macro is thus removed. Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>