staging: ks7010: fix "prohibited space" errors reported by checkpatch

Fix all occurences of the following checkpatch errors in ks_hostif.c:
  - ERROR: space prohibited after that '&' (ctx:WxW)
  - ERROR: space prohibited after that open parenthesis '('
  - ERROR: space prohibited before that close parenthesis ')'

Signed-off-by: Philipp Hoefflin <p.hoefflin@posteo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>