ARM: dts: samsung: smdk4412: fix keypad no-autorepeat

ARM: dts: samsung: smdk4412: fix keypad no-autorepeat

Although the Samsung SoC keypad binding defined
linux,keypad-no-autorepeat property, Linux driver never implemented it
and always used linux,input-no-autorepeat.  Correct the DTS to use
property actually implemented.

This also fixes dtbs_check errors like:

  exynos4412-smdk4412.dtb: keypad@100a0000: 'key-A', 'key-B', 'key-C', 'key-D', 'key-E', 'linux,keypad-no-autorepeat' do not match any of the regexes: '^key-[0-9a-z]+$', 'pinctrl-[0-9]+'

Cc: <stable@vger.kernel.org>
Fixes: c9b92dd70107 ("ARM: dts: Add keypad entries to SMDK4412")
Link: https://lore.kernel.org/r/20240312183105.715735-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>