Revert the changes that added p10-aes-gcm:
0781bbd7ea ("crypto: p10-aes-gcm - A perl script to process PowerPC assembler source")
41a6437ab4 ("crypto: p10-aes-gcm - Supporting functions for ghash")
3b47eccaaf ("crypto: p10-aes-gcm - Supporting functions for AES")
ca68a96c37 ("crypto: p10-aes-gcm - An accelerated AES/GCM stitched implementation")
cc40379b6e ("crypto: p10-aes-gcm - Glue code for AES/GCM stitched implementation")
3c657e8689 ("crypto: p10-aes-gcm - Update Kconfig and Makefile")
These changes fail to build in many configurations and are not ready
for prime time.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>