MIPS: ingenic: Replace <linux/clk-provider.h> by <linux/of_clk.h>

The JZ4740 setup code is not a clock provider, and just needs to call
of_clk_init().

Hence it can include <linux/of_clk.h> instead of <linux/clk-provider.h>.

Fixes: f932449c ("MIPS: ingenic: Drop obsolete code, merge the rest in setup.c")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>