clk: ralink: mtmips: remove duplicated 'xtal' clock for Ralink SoC RT3883

Ralink SoC RT3883 has already 'xtal' defined as a base clock so there is no
need to redefine it again in fixed clocks section. Hence, remove the duplicate
one from there.

Fixes: d34db686a3d7 ("clk: ralink: mtmips: fix clocks probe order in oldest ralink SoCs")
Signed-off-by: Sergio Paracuellos <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/ralink/clk-mtmips.c

···
 	}
 
 static struct mtmips_clk_fixed rt3883_fixed_clocks[] = {
-	CLK_FIXED("xtal", NULL, 40000000),
 	CLK_FIXED("periph", "xtal", 40000000)
 };