radeonsi: Add missing error-checking to si_create_compute_state (v2)

radeonsi: Add missing error-checking to si_create_compute_state (v2)

When the uploading of shader fails on si_shader_binary_upload(),
it returns -ENOMEM. We should handle si_shader_binary_upload() failure path
on si_create_compute_state().

CID 1394027

v2: Fixes from Edward O'Callaghan's review
 a) Update explicitly return value check with "si_shader_binary_upload() < 0"
 b) Update commit message.

Signed-off-by: Mun Gwan-gyeong <elongbug@gmail.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>