Platform/ARM: clone NorFlashDxe from ArmPlatformPkg

The ArmPlatformPkg version of NorFlashDxe and NorFlashStandaloneMm will
be going away, so clone them into Platform/ARM where the ARM platforms
that rely on this driver can keep using it.

Other than updating the INF version, refreshing the file GUIDs and
reorganizing the various INF sections, no changes have been made to the
driver.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>