nvk: Increase push constant space to 256B

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32433>

src/nouveau/vulkan/nvk_cmd_buffer.h

@@ -62,7 +62,7 @@ struct nvk_root_descriptor_table {
    union nvk_buffer_descriptor dynamic_buffers[NVK_MAX_DYNAMIC_BUFFERS];
 
    /* enfore alignment to 0x100 as needed pre pascal */
-   uint8_t __padding[0x38];
+   uint8_t __padding[0xb8];
 };
 
 /* helper macro for computing root descriptor byte offsets */

src/nouveau/vulkan/nvk_private.h

@@ -11,7 +11,7 @@
 #include "vk_util.h"
 
 #define NVK_MAX_SETS 32
-#define NVK_MAX_PUSH_SIZE 128
+#define NVK_MAX_PUSH_SIZE 256
 #define NVK_MAX_DYNAMIC_BUFFERS 64
 #define NVK_MAX_RTS 8
 #define NVK_MAX_SAMPLES 8