disable the inline hack with HIP (#1780)

we can how toggle it via a build parameter

Author: zingale

Make.Microphysics_extern

@@ -1,9 +1,12 @@
 # This is the main include makefile for applications that want to use Microphysics
 # You should set NETWORK_OUTPUT_PATH before including this file
 
-# For HIP, inlining produces large kernels that seem to cause memory issues
+# For some (older?) versions of HIP, inlining produces large kernels
+# that seem to cause memory issues
 ifeq ($(USE_HIP),TRUE)
+  ifeq ($(DISABLE_HIP_INLINE),TRUE)
     EXTRACXXFLAGS += -mllvm -amdgpu-function-calls=true
+  endif
 endif
 
 # for common code paths between simplified-SDC and true-SDC, we'll