riscv: errata: andes: Makefile: Fix randconfig build issue

Compile the andes errata with cflags set to " -mcmodel=medany"
when CONFIG_RISCV_ALTERNATIVE_EARLY is enabled.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Lad Prabhakar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: prabhakarlad

arch/riscv/errata/andes/Makefile

@@ -1 +1,5 @@
+ifdef CONFIG_RISCV_ALTERNATIVE_EARLY
+CFLAGS_errata.o := -mcmodel=medany
+endif
+
 obj-y += errata.o