egl: pass EGL_NO_CONTEXT to eglCreateImage for tfp
egl: pass EGL_NO_CONTEXT to eglCreateImage for tfp

When passing the EGL_NATIVE_PIXMAP_KHR target to eglCreateImage the
EGL_KHR_image_pixmap extension explicitly states that EGL_NO_CONTEXT
must also be passed so we are now careful to do this.

Reviewed-by: Neil Roberts <822ec91a7ef82248fd36162ca8ac3283eba70848@linux.intel.com>

Distrotech/cogl,djdeath/cogl,djdeath/cogl,Distrotech/cogl,Distrotech/cogl,djdeath/cogl,collects/cogl,Distrotech/cogl,djdeath/cogl-android,gcampax/cogl,collects/cogl,gcampax/cogl,djdeath/cogl-android,gcampax/cogl,gcampax/cogl,djdeath/cogl-android