xen/riscv: Fix early_puts() newline handling

OpenSBI already expands \n to \r\n.  Don't repeat the expansion, as it doubles
the size of the resulting log with every other line being blank.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

xen/arch/riscv/early_printk.c

@@ -27,8 +27,6 @@ void early_puts(const char *s, size_t nr)
 {
     while ( nr-- > 0 )
     {
-        if ( *s == '\n' )
-            sbi_console_putchar('\r');
         sbi_console_putchar(*s);
         s++;
     }