i915: Silence unused parameter warnings

i915: Silence unused parameter warnings

../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c: In function ‘intel_alloc_window_storage’:
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:290:48: warning: unused parameter ‘ctx’ [-Wunused-parameter]
 intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
                                                ^~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c: In function ‘intel_nop_alloc_storage’:
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:303:74: warning: unused parameter ‘rb’ [-Wunused-parameter]
 intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
                                                                          ^~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:304:32: warning: unused parameter ‘internalFormat’ [-Wunused-parameter]
                         GLenum internalFormat, GLuint width, GLuint height)
                                ^~~~~~~~~~~~~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:304:55: warning: unused parameter ‘width’ [-Wunused-parameter]
                         GLenum internalFormat, GLuint width, GLuint height)
                                                       ^~~~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:304:69: warning: unused parameter ‘height’ [-Wunused-parameter]
                         GLenum internalFormat, GLuint width, GLuint height)
                                                                     ^~~~~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c: In function ‘intel_bind_framebuffer’:
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:396:47: warning: unused parameter ‘fb’ [-Wunused-parameter]
                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
                                               ^~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:396:74: warning: unused parameter ‘fbread’ [-Wunused-parameter]
                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
                                                                          ^~~~~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c: In function ‘intel_renderbuffer_update_wrapper’:
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:422:57: warning: unused parameter ‘intel’ [-Wunused-parameter]
 intel_renderbuffer_update_wrapper(struct intel_context *intel,
                                                         ^~~~~
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c: In function ‘intel_blit_framebuffer_with_blitter’:
../../SOURCE/master/src/mesa/drivers/dri/i915/intel_fbo.c:644:61: warning: unused parameter ‘filter’ [-Wunused-parameter]
                                     GLbitfield mask, GLenum filter)
                                                             ^~~~~~

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>