Add kernel configuration option to enable/disable HR Timer

High resolution timer can now be excluded from the build.
There is currently no HR Timer implementation for other
platform than HiSi.

Note: HR Timer will be enabled by default

Signed-off-by: Zbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: I5daf8e0ceec2a17025b579513e3bd74db1040916

bsd/compat/linuxkpi/Makefile

@@ -33,6 +33,10 @@ MODULE_NAME := $(notdir $(shell pwd))
 
 LOCAL_SRCS :=  $(wildcard src/*.c)
 
+ifneq ($(LOSCFG_HRTIMER_ENABLE), y)
+LOCAL_SRCS := $(filter-out src/linux_hrtimer.c, $(LOCAL_SRCS))
+endif
+
 LOCAL_INCLUDE := \
         -I $(LITEOSTOPDIR)/kernel/base/include \
         -I $(LITEOSTOPDIR)/bsd/compat/linuxkpi/include