crypto: bcm - remove -I. header search path and unused macro define

The header search path -I. in kernel Makefiles is very suspicious;
it allows the compiler to search for headers in the top of $(srctree),
where obviously no header file exists.

'git grep BCMDRIVER' has no hit. So, this macro is not referenced.

I was able to build this driver without the extra compiler options.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/bcm/Makefile

@@ -11,5 +11,3 @@
 obj-$(CONFIG_CRYPTO_DEV_BCM_SPU) := bcm_crypto_spu.o
 
 bcm_crypto_spu-objs :=  util.o spu.o spu2.o cipher.o
-
-ccflags-y += -I. -DBCMDRIVER