arm: davinci: remove leftover code for dm* SoCs

The support for DaVinci DM* SoCs has been dropped a while ago. There's
still a lot of leftover code in mach-davinci though. Entirely remove
certain files and modify the common code to no longer reference
unsupported chips.

Note: all DaVinci platforms supported in u-boot now define SOC_DA8XX
but not all define SOC_DA850 (e.g. omapl138). We can safely remove
all ifdefs for the former, but let's leave the ones for the latter.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

arch/arm/mach-davinci/misc.c

@@ -68,7 +68,6 @@ err:
 /*
  * Set the mii mode as MII or RMII
  */
-#if defined(CONFIG_SOC_DA8XX)
 void davinci_emac_mii_mode_sel(int mode_sel)
 {
 	int val;
@@ -80,7 +79,7 @@ void davinci_emac_mii_mode_sel(int mode_sel)
 		val |= (1 << 8);
 	writel(val, &davinci_syscfg_regs->cfgchip3);
 }
-#endif
+
 /*
  * If there is no MAC address in the environment, then it will be initialized
  * (silently) from the value in the EEPROM.
@@ -106,7 +105,6 @@ void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
 }
 #endif	/* CONFIG_DRIVER_TI_EMAC */
 
-#if defined(CONFIG_SOC_DA8XX)
 void irq_init(void)
 {
 	/*
@@ -135,4 +133,3 @@ int da8xx_configure_lpsc_items(const struct lpsc_resource *item,
 
 	return 0;
 }
-#endif