pinctrl: Kconfig: remove duplicated nodes

Remove the duplicated configs introduced when the same patch is
applied twice times:
- commit e878b53a ("dm: pinctrl: introduce PINCONF_RECURSIVE
  option")
- commit c20851b3 ("dm: pinctrl: introduce PINCONF_RECURSIVE
  option")

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>