configure: detect AMD HQScaler

(cherry picked from commit 803499c569)

configure.ac

@@ -1941,6 +1941,20 @@ AS_IF([test "$enable_v4l2" != "no"], [
 ])
 AM_CONDITIONAL(HAVE_V4L2, [test "${have_v4l2}" != "no"])
 
+dnl
+dnl  AMD Advanced Media Framework API
+dnl
+AC_ARG_ENABLE([amf-scaler], AS_HELP_STRING([--disable-amf-scaler],
+  [disable AMD AMF API (default auto)]))
+have_amf_scaler="no"
+AS_IF([test "$enable_amf_scaler" != "no"], [
+  AC_CHECK_HEADERS([AMF/core/PropertyStorage.h AMF/components/HQScaler.h], [
+    have_amf_scaler="yes"
+    AC_DEFINE(HAVE_AMF_SCALER, 1, AMD HQScaler supported)
+  ])
+])
+AM_CONDITIONAL([HAVE_AMF_SCALER], [test "${have_amf_scaler}" != "no"])
+
 dnl
 dnl special access module for Blackmagic SDI cards
 dnl