gpu_driver: Add linux support.

config/config.conf

@@ -26,6 +26,7 @@ print_info() {
     info "GPU" gpu
     info "Memory" memory
 
+    # info "GPU Driver" gpu_driver  # Linux only
     # info "CPU Usage" cpu_usage
     # info "Disk" disk
     # info "Battery" battery

config/travis.conf

@@ -21,6 +21,7 @@ print_info() {
     info "Terminal Font" term_font
     info "CPU" cpu
     info "GPU" gpu
+    info "GPU Driver" gpu_driver
     info "Memory" memory
 
     info "CPU Usage" cpu_usage

neofetch

@@ -2258,6 +2258,14 @@ get_locale() {
     locale="$sys_locale"
 }
 
+get_gpu_driver() {
+    case "$os" in
+        "Linux")
+            gpu_driver="$(lspci -nnk | awk -F ': ' '/VGA/{nr[NR+2]}; NR in nr {print $2}')"
+        ;;
+    esac
+}
+
 get_cols() {
     if [[ "$color_blocks" == "on" ]]; then
         # Convert the width to space chars.