ARM: dts: exynos: Use labels instead of full paths in exynos4412-trats2

Extend camera and i2c1_isp nodes by labels, not by full path in Exynos
4412 Trats2.  This avoids error-prone redefinition of nodes.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>