qcacmn: Extend kernel version condition in i_qdf_time.h

For kernel v3.17 and above, timekeeping.h is included for
some kernel APIs such as ktime_get() but for versions prior to 3.17,
the above APIs are present in hrtimer.h.

To accommodate the usage of these APIs for older kernel versions,
include <linux/hrtimer.h> into this file for kernel versions
lower than 3.17

Change-Id: I445a1673d9067a2dd47045d6c48d73aaa239790e
CRs-Fixed: 2252563
diff --git a/qdf/linux/src/i_qdf_time.h b/qdf/linux/src/i_qdf_time.h
index efde8b2..7f0b41e 100644
--- a/qdf/linux/src/i_qdf_time.h
+++ b/qdf/linux/src/i_qdf_time.h
@@ -29,6 +29,8 @@
 #include <linux/ktime.h>
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0))
 #include <linux/timekeeping.h>
+#else
+#include <linux/hrtimer.h>
 #endif
 #ifdef MSM_PLATFORM
 #include <asm/arch_timer.h>