lib: sbi: Add sbi_domain_root_add_memrange() API

This patch generalizes the logic to add a memory range with desired
alignment and flags of consecutive regions to the root domain.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

include/sbi_utils/timer/aclint_mtimer.h

@@ -22,6 +22,8 @@
 
 #define CLINT_MTIMER_OFFSET		0x4000
 
+#define MTIMER_REGION_ALIGN		0x1000
+
 struct aclint_mtimer_data {
 	/* Public details */
 	unsigned long mtime_freq;