ARM i.MX irq: Compile avic irq code only on SoCs that need it

This patch adds a Kconfig option for the avic irq controller
and lets the SoCs that need it select this option.
Also, as we have two irq controllers for i.MX, irq.c is not
appropriate anymore, so rename it to avic.c

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index a31fa161bb6..6c66bc0521d 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -70,6 +70,9 @@ config MXC_TZIC
           containing this interrupt controller.
           Say N here only if you are really sure.
 
+config MXC_AVIC
+        bool
+
 config MXC_PWM
         tristate "Enable PWM driver"
         select HAVE_PWM