disk: part: implement generic function part_get_info_by_name()

So far partition search by name has been supported only on the EFI partition
table. This patch extends the search to all partition tables.

Rename part_get_info_efi_by_name() to part_get_info_by_name(), move it from
part_efi.c into part.c and make it a generic function which traverses all part
drivers and searches all partitions (in the order given by the linked list).

For this a new variable struct part_driver.max_entries is added, which limits
the number of partitions searched. For EFI this was GPT_ENTRY_NUMBERS.
Similarly the limit is defined for DOS, ISO, MAC and AMIGA partition tables.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Steve Rae <steve.rae@raedomain.com>
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index 8d0524d..a0a4a83 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -27,7 +27,7 @@
 {
 	int ret;
 
-	ret = part_get_info_efi_by_name(dev_desc, name, info);
+	ret = part_get_info_by_name(dev_desc, name, info);
 	if (ret) {
 		/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
 		char env_alias_name[25 + 32 + 1];
@@ -38,7 +38,7 @@
 		strncat(env_alias_name, name, 32);
 		aliased_part_name = getenv(env_alias_name);
 		if (aliased_part_name != NULL)
-			ret = part_get_info_efi_by_name(dev_desc,
+			ret = part_get_info_by_name(dev_desc,
 					aliased_part_name, info);
 	}
 	return ret;