nv2a: Fix fixed point NV_PVIDEO_POINT_IN handling

Tests: https://github.com/abaire/nxdk_pgraph_tests/blob/c047da43bb6b6d8b011310204cae6eb6e77b2c5a/src/tests/pvideo_tests.cpp#L1063

Fixes #2432

Author: abaire

hw/xbox/nv2a/pgraph/gl/display.c

@@ -269,7 +269,7 @@ static void render_display_pvideo_overlay(NV2AState *d)
                  GL_UNSIGNED_BYTE, tex_rgba);
     g_free(tex_rgba);
     glUniform1i(r->disp_rndr.pvideo_tex_loc, 1);
-    glUniform2f(r->disp_rndr.pvideo_in_pos_loc, in_s, in_t);
+    glUniform2f(r->disp_rndr.pvideo_in_pos_loc, in_s / 16.f, in_t / 8.f);
     glUniform4f(r->disp_rndr.pvideo_pos_loc,
                 out_x, out_y, out_width, out_height);
     glUniform3f(r->disp_rndr.pvideo_scale_loc,

hw/xbox/nv2a/pgraph/vk/display.c

@@ -886,8 +886,8 @@ static void update_uniforms(PGRAPHState *pg, SurfaceBinding *surface)
             GET_MASK(pvideo->color_key, NV_PVIDEO_COLOR_KEY_RED) / 255.0,
             GET_MASK(pvideo->color_key, NV_PVIDEO_COLOR_KEY_GREEN) / 255.0,
             GET_MASK(pvideo->color_key, NV_PVIDEO_COLOR_KEY_BLUE) / 255.0);
-        uniform2f(l, uniform_index(l, "pvideo_in_pos"), pvideo->in_s,
-                  pvideo->in_t);
+        uniform2f(l, uniform_index(l, "pvideo_in_pos"), pvideo->in_s / 16.f,
+                  pvideo->in_t / 8.f);
         uniform4f(l, uniform_index(l, "pvideo_pos"), pvideo->out_x,
                   pvideo->out_y, pvideo->out_width, pvideo->out_height);
         uniform4f(l, uniform_index(l, "pvideo_scale"), pvideo->scale_x,