ARM: dts: qcom: apq8026-lg-lenok: rename board vendor

In order to avoid having prefixes for multiple internal divisions of LG
use the "lg" prefix instead of "lge".

Fixes: ad3f04b7

 ("ARM: dts: qcom: Add support for LG G Watch R")
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210928203815.77175-2-luca@z3ntu.xyz