omap4.conf: Disable OMAP2 support

When the kernel is built with CONFIG_ARCH_OMAP2 it will select
CPU_V6 and other dependencies which causes issues in user space.
For example when clients try to connect to PulseAudio they will
crash with:
Assertion 'pthread_mutex_unlock(&m->mutex) == 0' failed at pulsecore/mutex-posix.c:108, function pa_mutex_unlock(). Aborting.

Remove support for OMAP2 for now.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
diff --git a/linaro/configs/omap4.conf b/linaro/configs/omap4.conf
index 59e9f23..7599f80 100644
--- a/linaro/configs/omap4.conf
+++ b/linaro/configs/omap4.conf
@@ -11,6 +11,7 @@
 CONFIG_OMAP_MUX_DEBUG=y
 CONFIG_ARCH_OMAP2PLUS=y
 CONFIG_SOC_OMAP5=y
+# CONFIG_ARCH_OMAP2 is not set
 CONFIG_ARCH_VEXPRESS_CA9X4=y
 CONFIG_ARM_THUMBEE=y
 CONFIG_ARM_ERRATA_411920=y