kern/ieee1275/init/ppc64: Decide by request whether to initialize region

Let the regions_claim() request structure's init_region determine whether
to call grub_mm_init_region() on it. This allows for adding memory to
GRUB's memory heap if init_region is set to true, or direct usage of the
memory otherwise. Set all current callers' init_region to true since they
want to add memory regions to GRUB's heap.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Pavithra Prakash <pavrampu@in.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Carolyn Scherrer <cpscherr@us.ibm.com>
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Sourabh Jain <sourabhjain@linux.ibm.com>

include/grub/ieee1275/alloc.h

@@ -21,11 +21,14 @@
 #ifndef GRUB_IEEE1275_ALLOC_HEADER
 #define GRUB_IEEE1275_ALLOC_HEADER	1
 
+#include <stdbool.h>
+
 #include <grub/memory.h>
 
 struct regions_claim_request {
   unsigned int flags;     /* GRUB_MM_ADD_REGION_(NONE|CONSECUTIVE) */
   grub_uint32_t total;    /* number of requested bytes */
+  bool init_region;       /* whether to add memory to the heap using grub_mm_init_region() */
 };
 
 #endif /* GRUB_IEEE1275_ALLOC_HEADER */