CBMEM: Drop parameters from cbmem_init()

The parameters can be dropped as initialisation always happens for
the region resolved with cbmem_locate_table().

This is no longer referenced externally, make it static.

Change-Id: Ia40350a5232dcbf30aca7b5998e7995114c44551
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3565
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/include/cbmem.h

@@ -137,7 +137,6 @@ void cbmem_late_set_table(uint64_t base, uint64_t size);
 int cbmem_base_check(void);
 #endif
 
-void cbmem_init(u64 baseaddr, u64 size);
 int cbmem_reinit(void);
 
 void get_cbmem_table(uint64_t *base, uint64_t *size);