pinctrl: k210: Rename power domains to match datasheet

This renames power domains to match the names on the k210 datasheet.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reported-by: Damien Le Moal <Damien.LeMoal@wdc.com>
Reviewed-by: Rick Chen <rick@andestech.com>

doc/device-tree-bindings/pinctrl/kendryte,k210-fpioa.txt

@@ -18,7 +18,7 @@ Pin configuration nodes are documented in pinctrl-bindings.txt
 Required properties for pin-configuration nodes or sub-nodes are:
 - groups: list of power groups to which the configuration applies. Valid groups
   are:
-	A0, A1, A2, B0, B1, B2, C0, C1
+	A0, A1, A2, B3, B4, B5, C6, C7
   (either this or "pinmux" must be specified)
 - pinmux: integer array representing pin multiplexing configuration. In addition
   to the 256 standard functions, each pin can also output the direction

drivers/pinctrl/pinctrl-kendryte.c

@@ -153,11 +153,11 @@ static const char k210_pc_group_names[][3] = {
 	[0] = "A0",
 	[1] = "A1",
 	[2] = "A2",
-	[3] = "B0",
-	[4] = "B1",
-	[5] = "B2",
-	[6] = "C0",
-	[7] = "C1",
+	[3] = "B3",
+	[4] = "B4",
+	[5] = "B5",
+	[6] = "C6",
+	[7] = "C7",
 };
 
 static int k210_pc_get_groups_count(struct udevice *dev)