update t440p script

coreboot-t440p/steps/update_bios.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+# Step: Update coreboot internally (when already running coreboot)
+
+step_update_bios() {
+  section "Update Coreboot (Internal Flash)"
+
+  info "This updates your coreboot installation without an external programmer."
+  info "Only use this if your T440p is already running coreboot."
+  echo ""
+
+  if [ ! -f "$COREBOOT_DIR/build/coreboot.rom" ]; then
+    error "coreboot.rom not found. Build coreboot first."
+    return 1
+  fi
+
+  warn "This will overwrite your current BIOS using internal flashing."
+  if ! prompt_yes_no "Continue?"; then
+    return 0
+  fi
+
+  info "Flashing coreboot internally..."
+  run_cmd "sudo flashrom -p internal:laptop=force_I_want_a_brick -w $COREBOOT_DIR/build/coreboot.rom" || return 1
+
+  success "Coreboot updated! Reboot to apply."
+}