ARM: socfpga: clk: Make L4SP and MMC clock calculation Gen5 only

The L4SP and MMC clock precalculation is specific to Gen5, it is not
needed on Arria10/Stratix10. Isolate it to Gen5 until there is a proper
clock driver for Gen5, at which point this will go away completely.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>

arch/arm/mach-socfpga/clock_manager.c

@@ -42,9 +42,11 @@ int cm_wait_for_fsm(void)
 
 int set_cpu_clk_info(void)
 {
+#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
 	/* Calculate the clock frequencies required for drivers */
 	cm_get_l4_sp_clk_hz();
 	cm_get_mmc_controller_clk_hz();
+#endif
 
 	gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
 	gd->bd->bi_dsp_freq = 0;