Since Linux 4.3, rdtscl() is no longer available and native_read_tsc()
is renamed to rdtsc(). Move the macro contents in-line and call the
new function. References:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=fe47ae6e1a5005b2e82f7eab57b5c3820453293a
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=4ea1636b04dbd66536fa387bae2eea463efc705b

---
 src/shared/linux_osl.c |    4 ++++
 1 file changed, 4 insertions(+)

diff -Nurp broadcom-wl-6.30.223.271.orig/src/shared/linux_osl.c broadcom-wl-6.30.223.271/src/shared/linux_osl.c
--- broadcom-wl-6.30.223.271.orig/src/shared/linux_osl.c	2015-09-19 01:47:30.000000000 +0300
+++ broadcom-wl-6.30.223.271/src/shared/linux_osl.c	2020-01-11 01:17:02.688960782 +0200
@@ -932,7 +932,11 @@ osl_getcycles(void)
 	uint cycles;
 
 #if defined(__i386__)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)
+	cycles = (u32)rdtsc();
+#else
 	rdtscl(cycles);
+#endif
 #else
 	cycles = 0;
 #endif