clk: stm32mp1: Add CLK_IGNORE_UNUSED to ck_sys_dbg clock

Don't disable the dbg clock if was set by bootloader.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/clk-stm32mp1.c

@@ -1988,7 +1988,8 @@ static const struct clock_config stm32mp1_clock_cfg[] = {
 		  _DIV(RCC_MCO2CFGR, 4, 4, 0, NULL)),
 
 	/* Debug clocks */
-	GATE(CK_DBG, "ck_sys_dbg", "ck_axi", 0, RCC_DBGCFGR, 8, 0),
+	GATE(CK_DBG, "ck_sys_dbg", "ck_axi", CLK_IGNORE_UNUSED,
+	     RCC_DBGCFGR, 8, 0),
 
 	COMPOSITE(CK_TRACE, "ck_trace", ck_trace_src, CLK_OPS_PARENT_ENABLE,
 		  _GATE(RCC_DBGCFGR, 9, 0),