ARM: dts: exynos: Use new compatible string for thermistors in Trats2

As Murata Manufactures the NTC based thermistors. The vendor
name in the compatibility is preposed to change to "murata".

This patch uses the new compatibility string in Exynos4412 based
Trats2 board.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>