pinctrl: samsung: Fix the width of PINCFG_TYPE_DRV bitfields for Exynos5433

This patch fixes the wrong width of PINCFG_TYPE_DRV bitfields for Exynos5433
because PINCFG_TYPE_DRV of Exynos5433 has 4bit fields in the *_DRV
registers. Usually, other Exynos have 2bit field for PINCFG_TYPE_DRV.

Fixes: 3c5ecc9e ("pinctrl: exynos: Add support for Exynos5433")
Cc: stable@vger.kernel.org
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>