usb: host: ehci-dbg: put spaces around operators

This patch fixes coding style issues reported by checkpatch concerning
to missing spaces around operators.

There is an additional change on line 49 that removes unnecessary
parentheses around ternary operands.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>