clk: qcom: ipq5018: keep XO clock always on

The XO clock must not be disabled to avoid the kernel trying to disable
the it. As such, keep the XO clock always on by flagging it as critical.

Signed-off-by: George Moussalem <george.moussalem@outlook.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250516-ipq5018-cmn-pll-v4-1-389a6b30e504@outlook.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/clk/qcom/gcc-ipq5018.c

@@ -1371,7 +1371,7 @@ static struct clk_branch gcc_xo_clk = {
 				&gcc_xo_clk_src.clkr.hw,
 			},
 			.num_parents = 1,
-			.flags = CLK_SET_RATE_PARENT,
+			.flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
 			.ops = &clk_branch2_ops,
 		},
 	},