ARM: bcm: Enable BCM7038_L1_IRQ for ARCH_BRCMSTB

ARCH_BRCMSTB makes use of the irq-bcm7038-l1.c irqchip driver, enable
it.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/mach-bcm/Kconfig

@@ -208,6 +208,7 @@ config ARCH_BRCMSTB
 	select ARM_GIC
 	select ARM_ERRATA_798181 if SMP
 	select HAVE_ARM_ARCH_TIMER
+	select BCM7038_L1_IRQ
 	select BRCMSTB_L2_IRQ
 	select BCM7120_L2_IRQ
 	select ARCH_HAS_HOLES_MEMORYMODEL