The ornamental design for a galley upper for an aircraft, as shown and described.
FIG. 1 is a perspective view of a galley upper for an aircraft showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a first side view thereof;
FIG. 4 is a second side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a perspective environment of a galley including the galley upper of FIG. 1.
The solid lines illustrate features that form part of the claimed design. The broken lines illustrate structure and environment that form no part of the claimed design. The back view of the galley upper forms no part of the claimed design.