Merge pull request #12819 from kyle-cypress/pr/psoc6-spi-memfix

Cypress: Fix unitialized memory in spi_master_write

Author: 0xc0170

targets/TARGET_Cypress/TARGET_PSOC6/cy_spi_api.c

@@ -140,9 +140,9 @@ void spi_frequency(spi_t *obj, int hz)
 int spi_master_write(spi_t *obj, int value)
 {
     struct spi_s *spi = cy_get_spi(obj);
-    int received;
+    uint8_t received;
 
-    if (CY_RSLT_SUCCESS != cyhal_spi_transfer(&(spi->hal_spi), (const uint8_t *)&value, 1, (uint8_t *)&received, 1, 0xff)) {
+    if (CY_RSLT_SUCCESS != cyhal_spi_transfer(&(spi->hal_spi), (const uint8_t *)&value, 1, &received, 1, 0xff)) {
         MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SPI, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_spi_transfer");
     }
     return received;