Convert the MT8135 clock drivers to platform_driver using the common
simple probe mechanism.

Now that all of the MT8135 clock drivers (including apmixedsys) can
be compiled as modules, change the COMMON_CLK_MT8135 configuration
option to tristate to enable module build.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/clk/mediatek/Kconfig      |   2 +-
 drivers/clk/mediatek/clk-mt8135.c | 110 ++++++++++++------------------
 2 files changed, 43 insertions(+), 69 deletions(-)

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index 90691261cddb..a15fbdfd3a53 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig

@@ -423,7 +423,7 @@ config COMMON_CLK_MT7986_ETHSYS
          required on MediaTek MT7986 SoC.

 config COMMON_CLK_MT8135
-       bool "Clock driver for MediaTek MT8135"
+       tristate "Clock driver for MediaTek MT8135"
        depends on (ARCH_MEDIATEK && ARM) || COMPILE_TEST
        select COMMON_CLK_MEDIATEK
        default ARCH_MEDIATEK && ARM

diff --git a/drivers/clk/mediatek/clk-mt8135.c b/drivers/clk/mediatek/clk-mt8135.c
index 8785d58cb3a5..39fd919900e5 100644
--- a/drivers/clk/mediatek/clk-mt8135.c
+++ b/drivers/clk/mediatek/clk-mt8135.c

@@ -5,8 +5,10 @@
  */

 #include <linux/clk.h>
+#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/mfd/syscon.h>
 #include <dt-bindings/clock/mt8135-clk.h>

@@ -18,6 +20,7 @@
 static DEFINE_SPINLOCK(mt8135_clk_lock);

 static const struct mtk_fixed_factor top_divs[] __initconst = {
+       FACTOR(CLK_DUMMY, "top_divs_dummy", "clk_null", 1, 1),