Conditionally include <linux/limits.h> and <sys/params.h> on Linux, BSD

<linux/limits.h> should be included conditionally for Linux only, also
SPECNAMELEN used conditionally when the OS is FreeBSD requires to
include <sys/params.h>.

Signed-off-by: Eleni Maria Stea <elene.mst@gmail.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>

tests/amdgpu/amdgpu_test.c

@@ -37,7 +37,12 @@
 #include <sys/time.h>
 #include <stdarg.h>
 #include <stdint.h>
+#ifdef __linux__
 #include <linux/limits.h>
+#elif __FreeBSD__
+/* SPECNAMELEN in FreeBSD is defined here: */
+#include <sys/param.h>
+#endif
 #ifdef MAJOR_IN_MKDEV
 #include <sys/mkdev.h>
 #endif