package/nvidia-driver: add Linux in comment

Add "Linux" before kernel in comment to be consistent with other
packages and manual

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 956cd5b9b7136344bc2641fbe3e1abfa2eff1bc8)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/nvidia-driver/Config.in

@@ -75,7 +75,7 @@ config BR2_PACKAGE_NVIDIA_DRIVER_CUDA_PROGS
 
 endif # BR2_PACKAGE_NVIDIA_DRIVER_CUDA
 
-comment "nvidia kernel module needs a kernel to be built"
+comment "nvidia kernel module needs a Linux kernel to be built"
 	depends on !BR2_LINUX_KERNEL
 
 config BR2_PACKAGE_NVIDIA_DRIVER_MODULE