support/scripts/gen-bootlin-toolchains: handle RISC-V 64-bit toolchain change

toolchains.bootlin.com no longer provides a LP64 RISC-V 64-bit
toolchain, but a more useful LP64D RISC-V 64-bit toolchain. Of course,
the old tarballs remain available, but no new versions of the LP64
toolchain will be produced.

This commit reflects this change in the gen-bootlin-toolchains script.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/scripts/gen-bootlin-toolchains

@@ -158,8 +158,8 @@ arches = {
         'conditions': ['BR2_riscv', 'BR2_riscv_g', 'BR2_RISCV_32', 'BR2_RISCV_ABI_ILP32D'],
         'prefix': 'riscv32',
     },
-    'riscv64': {
-        'conditions': ['BR2_riscv', 'BR2_riscv_g', 'BR2_RISCV_64', 'BR2_RISCV_ABI_LP64'],
+    'riscv64-lp64d': {
+        'conditions': ['BR2_riscv', 'BR2_riscv_g', 'BR2_RISCV_64', 'BR2_RISCV_ABI_LP64D'],
         'prefix': 'riscv64',
     },
     'sh-sh4': {