usage str91x pins

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* Pin ** ALT ****** Descript **
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* P2.4 * ALT_OUT2 * SSP0_SCLK *
* P2.5 * ALT_OUT3 * SSP0_MOSI *
* P2.6 * ALT_IN1 ** SSP0_MISO *
* P2.7 * ALT_OUT2 * SSP0_NSS **
---- SD Card Connection -------
* P3.0 * ALT_IN1 ** UART0_Rxd *
* P3.1 * ALT_OUT2 * UART0_TX **
- Serial Terminal Connection --
* P3.2 * ALT_IN1 ** UART1_Rxd *
* P3.3 * ALT_OUT2 * UART1_TX **
--- GPS Module Connection -----
* P3.4 * ALT_OUT2 * SSP1_SCLK *
* P3.5 * ALT_IN1 ** SSP1_MISO *
* P3.6 * ALT_OUT2 * SSP1_MOSI *
* P3.7 * ALT_OUT2 * SSP1_NSS **
-- TLV320AIC261 Connection ----
* P4.x -> general ADC(touch panel)
* P7.[0:5] -> [RELEASE,CSB,RS,WRB,RDB,RESTB]
* P8.x -> DB1..8
* p9.x -> DB9..17
--- LCD connnection -----------