genirq: Bump the size of the local variable for sprintf()

GCC is not happy about a sprintf() call on a buffer that might be too small
for the given formatting string.

kernel/irq/debugfs.c:233:26: warning: 'sprintf' may write a terminating nul past the end of the destination [-Wformat-overflow=]

Fix this by bumping the size of the local variable for sprintf().

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

Author: andy-shev

kernel/irq/debugfs.c

@@ -225,7 +225,7 @@ void irq_debugfs_copy_devname(int irq, struct device *dev)
 
 void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc)
 {
-	char name [10];
+	char name [12];
 
 	if (!irq_dir || !desc || desc->debugfs_file)
 		return;