include/string: Add strrchr

Copy strrchr from libpayload.
To be used by Cavium's BDK or FDT parsers.

Change-Id: Iab7981c25113ed16f1b8130de4935d30c29d2fa5
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/25447
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
1 file changed