V4L/DVB sh_mobile_ceu: don't check platform_get_irq's return value against zero
V4L/DVB sh_mobile_ceu: don't check platform_get_irq's return value against zero

platform_get_irq returns -ENXIO on failure, so !irq was probably
always true.  Better use (int)irq <= 0.  Note that a return value of
zero is still handled as error even though this could mean irq0.

This is a followup to 305b3228f9ff4d59f49e6d34a7034d44ee8ce2f0 that
changed the return value of platform_get_irq from 0 to -ENXIO on error.

Cc: David Vrabel <e99b46f9a5fe22c128843e5d6b63c64cad659fea@arcom.com>
Cc: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@suse.de>
Cc: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@infradead.org>
Cc: Guennadi Liakhovetski <50875182aae23d69ca7738697596f18a14e926fc@gmx.de>
Cc: Magnus Damm <2336f5729424d0c84d319e991b3648cafa2c3c5b@igel.co.jp>
Cc: Kuninori Morimoto <b61d36265632aa2ce6a907f3fe1c888f09d66423@renesas.com>
Cc: Paul Mundt <38b52dbb5f0b63d149982b6c5de788ec93a89032@linux-sh.org>
Cc: 9535f332c1f8b5fdb007bc39fec5cd3f7ab4e729@vger.kernel.org
Signed-off-by: Uwe Kleine-König <181323dd666a182bc2d953e52d0ac3ab54cd8391@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <50875182aae23d69ca7738697596f18a14e926fc@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs