clk: meson: migrate meson8b out of hw_onecell_data to drop NR_CLKS

The way hw_onecell_data is declared:
struct clk_hw_onecell_data {
	unsigned int num;
	struct clk_hw *hws[];
};

makes it impossible to have the clk_hw table declared outside while
using ARRAY_SIZE() to determine ".num" due to ".hws" being a flexible
array member.

Completely move out of hw_onecell_data and add a custom
devm_of_clk_add_hw_provider() "get" callback to retrieve the clk_hw
in order to finally get rid on the NR_CLKS define.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230607-topic-amlogic-upstream-clkid-public-migration-v2-5-38172d17c27a@linaro.org
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/meson/Kconfig

@@ -53,6 +53,7 @@ config COMMON_CLK_MESON8B
 	depends on ARM
 	default y
 	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
 	select COMMON_CLK_MESON_MPLL
 	select COMMON_CLK_MESON_PLL
 	select MFD_SYSCON

drivers/clk/meson/meson8b.h

@@ -185,8 +185,6 @@
 #define CLKID_VID_PLL_LVDS_EN	216
 #define CLKID_HDMI_PLL_DCO_IN   217
 
-#define CLK_NR_CLKS		218
-
 /*
  * include the CLKID and RESETID that have
  * been made part of the stable DT binding