sdram: reduce pins drive strength

Author: facchinm

libraries/Portenta_SDRAM/src/ram_internal.c

@@ -89,7 +89,7 @@ bool sdram_init(void) {
     /* Common GPIO configuration */
     gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
     gpio_init_structure.Pull      = GPIO_PULLUP;
-    gpio_init_structure.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
+    gpio_init_structure.Speed     = GPIO_SPEED_FREQ_MEDIUM;
     gpio_init_structure.Alternate = GPIO_AF12_FMC;
 
     /* GPIOD configuration */