platform/x86:intel/pmc: Use the Elvis operator

Replace ternary operator with Elvis operator in
pmc_core_ltr_ignore_write() for better readability
of the code.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
Link: https://lore.kernel.org/r/20240624203218.2428475-9-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Author: xpardee-create

drivers/platform/x86/intel/pmc/core.c

@@ -522,7 +522,7 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file,
 
 	err = pmc_core_send_ltr_ignore(pmcdev, value, 1);
 
-	return err == 0 ? count : err;
+	return err ?: count;
 }
 
 static int pmc_core_ltr_ignore_show(struct seq_file *s, void *unused)