mtd: cfi_cmdset_0002: Fix coding style issues

This patch fixes mainly to remove unneeded spaces after '(' and before ')'.
Also some indentation errors are fixed.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>