minui: GRSurface::Create() computes data_size on its own.

GRSurface::Create() doesn't need to rely on caller specifying the buffer
size, as it can compute that info based on the given args.

This CL also uses `size_t` for all the parameters in
GRSurface::Create().

Test: Run recovery_unit_test on marlin.
Test: Build and boot into blueline recovery. `Run graphics test`.
Test: Build and boot into blueline charger mode.
Change-Id: Idec9381079196abf13553a475006fefcfca10950
diff --git a/minui/graphics_drm.h b/minui/graphics_drm.h
index 6ba46e6..57ba39b 100644
--- a/minui/graphics_drm.h
+++ b/minui/graphics_drm.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ -39,7 +40,8 @@
  private:
   friend class MinuiBackendDrm;
 
-  GRSurfaceDrm(int width, int height, int row_bytes, int pixel_bytes, int drm_fd, uint32_t handle)
+  GRSurfaceDrm(size_t width, size_t height, size_t row_bytes, size_t pixel_bytes, int drm_fd,
+               uint32_t handle)
       : GRSurface(width, height, row_bytes, pixel_bytes), drm_fd_(drm_fd), handle(handle) {}
 
   const int drm_fd_;