clk: meson: add axg misc bit to the mpll driver

On axg, the rate of the mpll is stuck as if sdm value was 4 and could not
change (expect for mpll2 strangely). Looking at the vendor kernel, it
turns out a new magic bit from the undocumented HHI_PLL_TOP_MISC register
is required.

Setting this bit solves the problem and the mpll rates are back to normal

Fixes: 78b4af312f ("clk: meson-axg: add clock controller drivers")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/meson/axg.c

@@ -292,6 +292,11 @@ static struct meson_clk_mpll axg_mpll0 = {
 		.shift   = 25,
 		.width	 = 1,
 	},
+	.misc = {
+		.reg_off = HHI_PLL_TOP_MISC,
+		.shift   = 0,
+		.width	 = 1,
+	},
 	.lock = &meson_clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll0",
@@ -322,6 +327,11 @@ static struct meson_clk_mpll axg_mpll1 = {
 		.shift   = 14,
 		.width	 = 1,
 	},
+	.misc = {
+		.reg_off = HHI_PLL_TOP_MISC,
+		.shift   = 1,
+		.width	 = 1,
+	},
 	.lock = &meson_clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll1",
@@ -352,6 +362,11 @@ static struct meson_clk_mpll axg_mpll2 = {
 		.shift   = 14,
 		.width	 = 1,
 	},
+	.misc = {
+		.reg_off = HHI_PLL_TOP_MISC,
+		.shift   = 2,
+		.width	 = 1,
+	},
 	.lock = &meson_clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll2",
@@ -382,6 +397,11 @@ static struct meson_clk_mpll axg_mpll3 = {
 		.shift   = 0,
 		.width	 = 1,
 	},
+	.misc = {
+		.reg_off = HHI_PLL_TOP_MISC,
+		.shift   = 3,
+		.width	 = 1,
+	},
 	.lock = &meson_clk_lock,
 	.hw.init = &(struct clk_init_data){
 		.name = "mpll3",