boards: CYW920829M2EVK-02: enable hw-flow-control for uart2 - enable hw-flow-control for uart2 - added p3_0_scb2_uart_cts, p3_1_scb2_uart_rts in **-pinctrl.dtsi Signed-off-by: Nazar Palamar <nazar.palamar@infineon.com>