clover: set LLVM min version to 8.0.1

It also bump from 8.0.0 to .1 for AMD gallium and VK

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6336>
diff --git a/meson.build b/meson.build
index 50e105e..76f72a9 100644
--- a/meson.build
+++ b/meson.build
@@ -1450,8 +1450,7 @@
   ]
 endif
 
-with_opencl_spirv = _opencl != 'disabled' and get_option('opencl-spirv')
-if with_amd_vk or with_gallium_radeonsi or with_opencl_spirv
+if with_amd_vk or with_gallium_radeonsi or with_gallium_opencl
   _llvm_version = '>= 8.0.0'
 elif with_gallium_swr
   _llvm_version = '>= 6.0.0'
@@ -1545,6 +1544,7 @@
   error('The OpenCL "Clover" state tracker requires LLVM, but LLVM is disabled.')
 endif
 
+with_opencl_spirv = _opencl != 'disabled' and get_option('opencl-spirv')
 if with_opencl_spirv
   chosen_llvm_version_array = dep_llvm.version().split('.')
   chosen_llvm_version_major = chosen_llvm_version_array[0].to_int()