In this bug:
https://bugs.mageia.org/show_bug.cgi?id=25890

The nvidia-current conftest.sh falsely detects support for
set_memory_array_uc/wb() in 5.4 series kernels

Fix it by adding linux kernel version checks to exclude the unsuppoorted code

Signed-off-by: Thomas Backlund <tmb@mageia.org>

diff -Nurp NVIDIA-Linux-x86_64-430.64.orig/kernel/nvidia/nv-vm.c NVIDIA-Linux-x86_64-430.64/kernel/nvidia/nv-vm.c
--- NVIDIA-Linux-x86_64-430.64.orig/kernel/nvidia/nv-vm.c	2019-10-27 13:48:11.000000000 +0200
+++ NVIDIA-Linux-x86_64-430.64/kernel/nvidia/nv-vm.c	2019-12-29 23:54:36.176732208 +0200
@@ -42,12 +42,14 @@ static inline int nv_set_memory_array_ty
 {
     switch (type)
     {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0)
 #if defined(NV_SET_MEMORY_ARRAY_UC_PRESENT)
         case NV_MEMORY_UNCACHED:
             return 1;
         case NV_MEMORY_WRITEBACK:
             return 1;
 #endif
+#endif
         default:
             return 0;
     }
@@ -61,6 +63,7 @@ static inline void nv_set_memory_array_t
 {
     switch (type)
     {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0)
 #if defined(NV_SET_MEMORY_ARRAY_UC_PRESENT)
         case NV_MEMORY_UNCACHED:
             set_memory_array_uc(pages, num_pages);
@@ -69,6 +72,7 @@ static inline void nv_set_memory_array_t
             set_memory_array_wb(pages, num_pages);
             break;
 #endif
+#endif
         default:
             nv_printf(NV_DBG_ERRORS,
                 "NVRM: %s(): type %d unimplemented\n",