Rename aosp_beryllium build target to beryllium

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/build/tasks/kernel.mk b/build/tasks/kernel.mk
index 9f1b137..1f2a338 100644
--- a/build/tasks/kernel.mk
+++ b/build/tasks/kernel.mk
@@ -1,4 +1,4 @@
-ifneq ($(filter aosp_beryllium, $(TARGET_DEVICE)),)
+ifneq ($(filter beryllium, $(TARGET_DEVICE)),)
 
 IMAGE_GZ := device/xiaomi/beryllium/prebuilt-kernel/android-$(TARGET_KERNEL_USE)/Image.gz
 DTB := device/xiaomi/beryllium/prebuilt-kernel/android-$(TARGET_KERNEL_USE)/sdm845-beryllium.dtb