NIOS2 fixes for v5.15

- Fix build warning for unmet dependency for EARLY_PRINTK
 - Remove unused dram_start() function
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Merge tag 'nios2_fixes_for_v5.15_part1' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux

Pull nios2 fixes from Dinh Nguyen:

 - Fix build warning for unmet dependency for EARLY_PRINTK

 - Remove unused dram_start() function

* tag 'nios2_fixes_for_v5.15_part1' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux:
  NIOS2: setup.c: drop unused variable 'dram_start'
  NIOS2: fix kconfig unmet dependency warning for SERIAL_CORE_CONSOLE

arch/nios2/Kconfig.debug

@@ -3,9 +3,10 @@
 config EARLY_PRINTK
 	bool "Activate early kernel debugging"
 	default y
+	depends on TTY
 	select SERIAL_CORE_CONSOLE
 	help
-	  Enable early printk on console
+	  Enable early printk on console.
 	  This is useful for kernel debugging when your machine crashes very
 	  early before the console code is initialized.
 	  You should normally say N here, unless you want to debug such a crash.

arch/nios2/kernel/setup.c

@@ -149,8 +149,6 @@ static void __init find_limits(unsigned long *min, unsigned long *max_low,
 
 void __init setup_arch(char **cmdline_p)
 {
-	int dram_start;
-
 	console_verbose();
 
 	memory_start = memblock_start_of_DRAM();