alif/ospi_flash: Remove workaround for P10_7 OSPI pinmux issue.

P5_6 doesn't have that alt function, and only has 7 alt functions.  This
workaround was never really needed, it was introduced in DFP because the
wrong P10_7 alt function was used, in original DFP sources.

This has been removed from DFP starting with 1.3.4, so remove it here also.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Author: iabdalkader

ports/alif/mcu/ensemble_pin_alt.csv

@@ -45,8 +45,7 @@ P5_2,GPIO,OSPI1_SCLKN,UART5_RX,PDM_C3,SPI0_SS0,LPI2C_SCL,UT1_T0,SD_D2
 P5_3,GPIO,OSPI1_SCLK,UART5_TX,SPI0_SCLK,LPI2C_SDA,UT1_T1,SD_D3,CDC_PCLK
 P5_4,GPIO,OSPI1_SS1,UART3_CTS,PDM_D2,SPI0_SS3,UT2_T0,SD_D4,CDC_DE
 P5_5,GPIO,OSPI1_SCLK,UART3_RTS,PDM_D3,UT2_T1,SD_D5,ETH_RXD0,CDC_HSYNC
-# P5_6 doesn't really have OSPI on AF1 but it's needed for P10_7 to be in OSPI1_RXDS mode
-P5_6,GPIO,OSPI1_RXDS,UART1_CTS,I2C2_SCL,UT3_T0,SD_D6,ETH_RXD1,CDC_VSYNC
+P5_6,GPIO,,UART1_CTS,I2C2_SCL,UT3_T0,SD_D6,ETH_RXD1,CDC_VSYNC
 P5_7,GPIO,OSPI1_SS0,UART1_RTS,I2C2_SDA,UT3_T1,SD_D7,ETH_RST,
 P6_0,GPIO,OSPI0_D0,UART4_DE,PDM_D0,UT4_T0,SD_D0,ETH_TXD0,
 P6_1,GPIO,OSPI0_D1,UART5_DE,PDM_C0,UT4_T1,SD_D1,ETH_TXD1,

ports/alif/ospi_flash.c

@@ -274,11 +274,6 @@ int ospi_flash_init(void) {
     if (pin->pin_rwds != NULL) {
         mp_hal_pin_config(pin->pin_rwds, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE,
             MP_HAL_PIN_SPEED_HIGH, MP_HAL_PIN_DRIVE_12MA, MP_HAL_PIN_ALT(OSPI_RXDS, unit), true);
-        if (pin->pin_rwds->port == PORT_10 && pin->pin_rwds->pin == PIN_7) {
-            // Alif: P5_6 is needed to support proper alt function selection of P10_7.
-            mp_hal_pin_config(pin_P5_6, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE,
-                MP_HAL_PIN_SPEED_HIGH, MP_HAL_PIN_DRIVE_12MA, MP_HAL_PIN_ALT(OSPI_RXDS, unit), true);
-        }
     }
     mp_hal_pin_config(pin->pin_d0, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE,
         MP_HAL_PIN_SPEED_HIGH, MP_HAL_PIN_DRIVE_12MA, MP_HAL_PIN_ALT(OSPI_D0, unit), true);