stand: Add 1440p to the list of known resolutions.

MFC after:	1 week
Reviewed by:	manu, kevans, imp
Differential Revision:	https://reviews.freebsd.org/D43391

stand/defaults/loader.conf

@@ -95,7 +95,7 @@ audit_event_type="etc_security_audit_event"
 bootenv_autolist="YES"		# Auto populate the list of ZFS Boot Environments
 #beastie_disable="NO"		# Turn the beastie boot menu on and off
 efi_max_resolution="1x1"	# Set the max resolution for EFI loader to use:
-				# 480p, 720p, 1080p, 2160p/4k, 5k, or specify
+				# 480p, 720p, 1080p, 1440p, 2160p/4k, 5k, or
 				# WidthxHeight (e.g. 1920x1080)
 #kernels="kernel kernel.old"	# Kernels to display in the boot menu
 kernels_autodetect="YES"	# Auto-detect kernel directories in /boot

stand/defaults/loader.conf.5

@@ -21,7 +21,7 @@
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
-.Dd December 20, 2023
+.Dd January 10, 2024
 .Dt LOADER.CONF 5
 .Os
 .Sh NAME
@@ -315,6 +315,7 @@ The following values are accepted:
 .It 480p Ta 640x480
 .It 720p Ta 1280x720
 .It 1080p Ta 1920x1080
+.It 1440p Ta 2560x1440
 .It 2160p Ta 3840x2160
 .It 4k Ta 3840x2160
 .It 5k Ta 5120x2880

stand/efi/loader/framebuffer.c

@@ -77,6 +77,11 @@ static struct named_resolution {
 		.width = 1920,
 		.height = 1080,
 	},
+	{
+		.name = "1440p",
+		.width = 2560,
+		.height = 1440,
+	},
 	{
 		.name = "2160p",
 		.alias = "4k",

stand/i386/libi386/vbe.c

@@ -84,6 +84,11 @@ static struct named_resolution {
 		.width = 1920,
 		.height = 1080,
 	},
+	{
+		.name = "1440p",
+		.width = 2560,
+		.height = 1440,
+	},
 	{
 		.name = "2160p",
 		.alias = "4k",