[PATCH] gpu/cuda: fix getenv related build error

[Levend Sayar <levendsayar@gmail.com>]

If gdrapi.h is available, meson sets DRIVERS_GPU_CUDA_GDRCOPY_H as 1.
This causes gdrcopy.c build to give an error;
because compiler can not find signature of getenv.
stdlib.h is included for the definition of getenv function.

Fixes: ca12f5e8a7db ("gpu/cuda: mark unused GDRCopy functions parameters")

Signed-off-by: Levend Sayar <levendsayar@gmail.com>
---
 drivers/gpu/cuda/gdrcopy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/cuda/gdrcopy.c b/drivers/gpu/cuda/gdrcopy.c
index 322a5dbeb2..bd56b73ce4 100644
--- a/drivers/gpu/cuda/gdrcopy.c
+++ b/drivers/gpu/cuda/gdrcopy.c
@@ -6,6 +6,8 @@
 
 #ifdef DRIVERS_GPU_CUDA_GDRCOPY_H
 
+#include <stdlib.h>
+
 static void *gdrclib;
 static gdr_t (*sym_gdr_open)(void);
 static int (*sym_gdr_pin_buffer)(gdr_t g, unsigned long addr, size_t size,
-- 
2.39.2 (Apple Git-143)