intel: fix EGLImage renderbuffer _BaseFormat

Correctly set _BaseFormat field when creating a gl_renderbuffer
with EGLImage storage.

Change-Id: I8c9f7302d18b617f54fa68304d8ffee087ed8a77
Signed-off-by: Frank Henigman <fjhenigman@google.com>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Chad Versace <chad.versace@intel.com>
2 files changed