ARM: dts: msm8974: castor: Fix typo and add startup delay in touchscreen node

The compatible string was mistakenly pulled from the downstream tree and the
startup delay property is needed to prevent io errors on initial page select.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>