clk: hisilicon: mark wdt_mux_p[] as const

The symbol is in the __initconst section but not marked init, which
caused a warning when building with LTO.

This makes it 'const' as was obviously intended.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: c80dfd9b ("clk: hisilicon: add CRG driver for Hi3516CV300 SoC")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/hisilicon/crg-hi3516cv300.c

@@ -204,7 +204,7 @@ static const struct hisi_crg_funcs hi3516cv300_crg_funcs = {
 /* hi3516CV300 sysctrl CRG */
 #define HI3516CV300_SYSCTRL_NR_CLKS 16
 
-static const char *wdt_mux_p[] __initconst = { "3m", "apb" };
+static const char *const wdt_mux_p[] __initconst = { "3m", "apb" };
 static u32 wdt_mux_table[] = {0, 1};
 
 static const struct hisi_mux_clock hi3516cv300_sysctrl_mux_clks[] = {