soc/intel/common: Make common cpu_cl_clear_data() weak

Not all SOC follow the same programming to clear crashlog
data. So make common implementation of cpu_cl_clear_data()
weak.

BUG=b:262501347
TEST=Able to build google/rex.

Change-Id: Ic2b4631d57703abff0ab1880fb272ef67bb1b8e9
Signed-off-by: Pratikkumar Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77237
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/soc/intel/common/block/crashlog/crashlog.c

@@ -149,7 +149,7 @@ int cpu_cl_mailbox_cmd(u8 cmd, u8 param)
 	return 1;
 }
 
-int cpu_cl_clear_data(void)
+int __weak cpu_cl_clear_data(void)
 {
 	return cpu_cl_mailbox_cmd(CPU_CRASHLOG_CMD_CLEAR, 0);
 }